Hello plugin authors,
Many of our clients use your Wordfence plugin (great!), however your use of the 503 response code to indicate that a host has been blocked is rather inconvenient.
This is for a couple of reasons:
* It deviates from what WordPress usually does (200 for failed login, 302 for success), so server-level filters (such as mod_security) stop working, and we end up having to write extra rules to deal with Wordfence
* It creates noise - may be monitoring the volume of 503s as an warning sign of other problems, the plugin dilutes the stats and again has to be filtered out
* It's not semantically correct
So thank you for writing a great plugin, and please consider this plea from an ops person to either follow WordPress' behavior or use a more-correct 4xx code.
Alex